Can anyone clarify this

Question

https://code.sololearn.com/cCsexByIF42E/?ref=app

Answer 1

This is one way without scanner.
https://code.sololearn.com/czDZBshWU0Vt/?ref=app

This is with scanner.
https://code.sololearn.com/c0qP9Z33NWCt/?ref=app

Answer 2

We can add constructor in that right!? in scanner class pgrm